decode-universal-time universal-time &optional time-zone
=> second, minute, hour, date, month, year, day, daylight-p, zone
universal-time---a universal time.
time-zone---a time zone.
second, minute, hour, date, month, year, day, daylight-p, zone---a decoded time.
Returns the decoded time represented by the given universal time.
If time-zone is not supplied, it defaults to the current time zone adjusted for daylight saving time. If time-zone is supplied, daylight saving time information is ignored. The daylight saving time flag is nil if time-zone is supplied.
(decode-universal-time 0 0) => 0, 0, 0, 1, 1, 1900, 0, false, 0 ;; The next two examples assume Eastern Daylight Time. (decode-universal-time 2414296800 5) => 0, 0, 1, 4, 7, 1976, 6, false, 5 (decode-universal-time 2414293200) => 0, 0, 1, 4, 7, 1976, 6, true, 5 ;; This example assumes that the time zone is Eastern Daylight Time ;; (and that the time zone is constant throughout the example). (let* ((here (nth 8 (multiple-value-list (get-decoded-time)))) ;Time zone (recently (get-universal-time)) (a (nthcdr 7 (multiple-value-list (decode-universal-time recently)))) (b (nthcdr 7 (multiple-value-list (decode-universal-time recently here))))) (list a b (equal a b))) => ((T 5) (NIL 5) NIL)
Implementation-dependent mechanisms for calculating when or if daylight savings time is in effect for any given session.
encode-universal-time, get-universal-time, Section 25.1.4 (Time)